<template>
  <view class="uni-calendar">
    <view
      v-if="!insert && show"
      class="uni-calendar__mask"
      :class="{ 'uni-calendar--mask-show': aniMaskShow }"
      @click="clean"
    ></view>
    <view
      v-if="insert || show"
      class="uni-calendar__content"
      :class="{ 'uni-calendar--fixed': !insert, 'uni-calendar--ani-show': aniMaskShow }"
    >
      <view v-if="!insert" class="uni-calendar__header uni-calendar--fixed-top">
        <view class="uni-calendar__header-btn-box" @click="close">
          <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ cancelText }}</text>
        </view>
        <view class="uni-calendar__header-btn-box" @click="confirm">
          <text class="uni-calendar__header-text uni-calendar--fixed-width">{{ okText }}</text>
        </view>
      </view>
      <view class="uni-calendar__header">
        <view class="uni-calendar__header-btn-box" @click.stop="pre">
          <view class="uni-calendar__header-btn uni-calendar--left"></view>
        </view>
        <view>
          <text class="uni-calendar__header-text">
            {{ convertYearAndMonth(nowDate.fullDate) }}
          </text>
        </view>
        <view class="uni-calendar__header-btn-box" @click.stop="next">
          <view class="uni-calendar__header-btn uni-calendar--right"></view>
        </view>
        <!-- <text class="uni-calendar__backtoday" @click="backToday">{{todayText}}</text> -->
      </view>
      <view class="uni-calendar__box">
        <view v-if="showMonth" class="uni-calendar__box-bg">
          <text class="uni-calendar__box-bg-text">{{ nowDate.month }}</text>
        </view>
        <view class="uni-calendar__weeks">
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ SUNText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ monText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ TUEText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ WEDText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ THUText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ FRIText }}</text>
          </view>
          <view class="uni-calendar__weeks-day">
            <text class="uni-calendar__weeks-day-text">{{ SATText }}</text>
          </view>
        </view>
        <view class="uni-calendar__weeks" v-for="(item, weekIndex) in weeks" :key="weekIndex">
          <view
            class="uni-calendar__weeks-item"
            v-for="(weeks, weeksIndex) in item"
            :key="weeksIndex"
          >
            <calendar-item
              class="uni-calendar-item--hook"
              :weeks="weeks"
              :calendar="calendar"
              :selected="selected"
              :lunar="lunar"
              :checkedBackground="checkedBackground"
              @change="choiceDate"
            ></calendar-item>
          </view>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
import Calendar from './util.js';
import CalendarItem from './uni-calendar-item.vue';
import { format } from 'date-fns';
/**
 * Calendar 日历
 * @description 日历组件可以查看日期，选择任意范围内的日期，打点操作。常用场景如：酒店日期预订、火车机票选择购买日期、上下班打卡等
 * @tutorial https://ext.dcloud.net.cn/plugin?id=56
 * @property {String} date 自定义当前时间，默认为今天
 * @property {Boolean} lunar 显示农历
 * @property {String} startDate 日期选择范围-开始日期
 * @property {String} endDate 日期选择范围-结束日期
 * @property {Boolean} range 范围选择
 * @property {Boolean} insert = [true|false] 插入模式,默认为false
 * 	@value true 弹窗模式
 * 	@value false 插入模式
 * @property {Boolean} clearDate = [true|false] 弹窗模式是否清空上次选择内容
 * @property {Array} selected 打点，期待格式[{date: '2019-06-27', info: '签到', data: { custom: '自定义信息', name: '自定义消息头',xxx:xxx... }}]
 * @property {Boolean} showMonth 是否选择月份为背景
 * @event {Function} change 日期改变，`insert :ture` 时生效
 * @event {Function} confirm 确认选择`insert :false` 时生效
 * @event {Function} monthSwitch 切换月份时触发
 * @example <uni-calendar :insert="true":lunar="true" :start-date="'2019-3-2'":end-date="'2019-5-20'"@change="change" />
 */
export default {
  components: {
    CalendarItem
  },
  emits: ['close', 'confirm', 'change', 'monthSwitch'],
  props: {
    dateList: {
      type: Array,
      default() {
        return [];
      }
    },
    date: {
      type: [String, Object],
      default: ''
    },
    selected: {
      type: Array,
      default() {
        return [];
      }
    },
    lunar: {
      type: Boolean,
      default: false
    },
    startDate: {
      type: String,
      default: ''
    },
    endDate: {
      type: String,
      default: ''
    },
    range: {
      type: Boolean,
      default: false
    },
    insert: {
      type: Boolean,
      default: true
    },
    showMonth: {
      type: Boolean,
      default: true
    },
    clearDate: {
      type: Boolean,
      default: true
    },
    checkedBackground: {
      type: String,
      default: '#269c74'
    }
  },
  data() {
    return {
      show: false,
      weeks: [],
      calendar: {},
      nowDate: '',
      aniMaskShow: false
    };
  },
  computed: {
    /**
     * for i18n
     */

    okText() {
      return this.$t('uni-calender.ok');
    },
    cancelText() {
      return this.$t('uni-calender.cancel');
    },
    todayText() {
      return this.$t('uni-calender.today');
    },
    monText() {
      return this.$t('uni-calender.MON');
    },
    TUEText() {
      return this.$t('uni-calender.TUE');
    },
    WEDText() {
      return this.$t('uni-calender.WED');
    },
    THUText() {
      return this.$t('uni-calender.THU');
    },
    FRIText() {
      return this.$t('uni-calender.FRI');
    },
    SATText() {
      return this.$t('uni-calender.SAT');
    },
    SUNText() {
      return this.$t('uni-calender.SUN');
    }
  },
  watch: {
    date: {
      handler(newVal) {
        this.cale.setDate(newVal);
        this.init(newVal);
      },
      deep: true
    },
    dateList: {
      handler(newVal) {
        this.checkDateList(newVal);
      },
      deep: true
    },
    weeks: {
      handler(newVal) {
        this.checkDateList(this.dateList);
      },
      deep: true
    },
    startDate(val) {
      this.cale.resetSatrtDate(val);
      this.cale.setDate(this.nowDate.fullDate);
      this.weeks = this.cale.weeks;
    },
    endDate(val) {
      this.cale.resetEndDate(val);
      this.cale.setDate(this.nowDate.fullDate);
      this.weeks = this.cale.weeks;
    },
    selected(newVal) {
      this.cale.setSelectInfo(this.nowDate.fullDate, newVal);
      this.weeks = this.cale.weeks;
    }
  },
  created() {
    this.cale = new Calendar({
      selected: this.selected,
      startDate: this.startDate,
      endDate: this.endDate,
      range: this.range
    });
    this.init(this.date);
  },
  methods: {
    convertYearAndMonth(dateStr) {
      if (typeof dateStr !== 'string') {
        dateStr = format(dateStr, 'yyyy-MM');
      }

      // 拆分日期字符串并提取年和月
      const [year, month] = dateStr.split('-');
      const parsedYear = parseInt(year);
      const parsedMonth = parseInt(month);

      // 英文月份缩写
      const monthAbbreviations = [
        'Jan',
        'Feb',
        'Mar',
        'Apr',
        'May',
        'Jun',
        'Jul',
        'Aug',
        'Sep',
        'Oct',
        'Nov',
        'Dec'
      ];

      const enMonthAbbr = monthAbbreviations[parsedMonth - 1];

      const translations = {
        'zh-Hant': `${parsedYear}年${parsedMonth}月`,
        ja: `${parsedYear}年${parsedMonth}月`,
        ko: `${parsedYear}년 ${parsedMonth}월`,
        en: `${enMonthAbbr} ${parsedYear}`,
        'zh-Hans': `${parsedYear}年${parsedMonth}月`
      };

      const locale = uni.getLocale();

      return translations[locale];
    },

    // 取消穿透
    clean() {},
    bindDateChange(e) {
      const value = e.detail.value + '-1';
      this.setDate(value);

      const { year, month } = this.cale.getDate(value);
      this.$emit('monthSwitch', {
        year,
        month
      });
    },
    /**
     * 初始化日期显示
     * @param {Object} date
     */
    init(date) {
      const { before, after } = date;
      if (before && after) {
        const beforeDateMonth = new Date(before).getMonth();
        const afterDateMonth = new Date(after).getMonth();
        if (beforeDateMonth > afterDateMonth) {
          this.cale.setDate(after);
        } else {
          this.cale.setDate(before);
          this.cale.setMultiple(before);
        }
        this.cale.setMultiple(after);
        this.nowDate = this.calendar = this.cale.getInfo(after);
        this.weeks = this.cale.weeks;
      } else {
        this.cale.setDate(before);
        this.nowDate = this.calendar = this.cale.getInfo(before);
        this.weeks = this.cale.weeks;
      }
    },

    checkDateList(dateList) {
      if (dateList.length <= 0) {
        return false;
      }
      for (const key of Object.keys(this.weeks)) {
        this.weeks[key].forEach((item1, index1) => {
          if (!item1.disable && item1.fullDate && dateList.indexOf(item1.fullDate) === -1) {
            item1.disable = true;
          }
        });
      }
    },

    /**
     * 打开日历弹窗
     */
    open() {
      // 弹窗模式并且清理数据
      if (this.clearDate && !this.insert) {
        this.cale.cleanMultipleStatus();
        // this.cale.setDate(this.date)
        this.init(this.date);
      }
      this.show = true;
      this.$nextTick(() => {
        setTimeout(() => {
          this.aniMaskShow = true;
        }, 50);
      });
    },
    /**
     * 关闭日历弹窗
     */
    close() {
      this.aniMaskShow = false;
      this.$nextTick(() => {
        setTimeout(() => {
          this.show = false;
          this.$emit('close');
        }, 300);
      });
    },
    /**
     * 确认按钮
     */
    confirm() {
      this.setEmit('confirm');
      this.close();
    },
    /**
     * 变化触发
     */
    change() {
      if (!this.insert) return;
      this.setEmit('change');
    },
    /**
     * 选择月份触发
     */
    monthSwitch() {
      let { year, month } = this.nowDate;
      this.$emit('monthSwitch', {
        year,
        month: Number(month)
      });
    },
    /**
     * 派发事件
     * @param {Object} name
     */
    setEmit(name) {
      let { year, month, date, fullDate, lunar, extraInfo } = this.calendar;
      this.$emit(name, {
        range: this.cale.multipleStatus,
        year,
        month,
        date,
        fulldate: fullDate,
        lunar,
        extraInfo: extraInfo || {}
      });
    },
    /**
     * 选择天触发
     * @param {Object} weeks
     */
    choiceDate(weeks) {
      if (weeks.disable) return;
      this.calendar = weeks;
      // 设置多选
      this.cale.setMultiple(this.calendar.fullDate);
      this.weeks = this.cale.weeks;
      this.change();
    },
    /**
     * 回到今天
     */
    backToday() {
      const nowYearMonth = `${this.nowDate.year}-${this.nowDate.month}`;
      const date = this.cale.getDate(new Date());
      const todayYearMonth = `${date.year}-${date.month}`;

      this.init(date.fullDate);

      if (nowYearMonth !== todayYearMonth) {
        this.monthSwitch();
      }

      this.change();
    },
    /**
     * 上个月
     */
    pre() {
      const preDate = this.cale.getDate(this.nowDate.fullDate, -1, 'month').fullDate;
      this.setDate(preDate);
      this.monthSwitch();
    },
    /**
     * 下个月
     */
    next() {
      const nextDate = this.cale.getDate(this.nowDate.fullDate, +1, 'month').fullDate;
      this.setDate(nextDate);
      this.monthSwitch();
    },
    /**
     * 设置日期
     * @param {Object} date
     */
    setDate(date) {
      this.cale.setDate(date);
      this.weeks = this.cale.weeks;
      this.nowDate = this.cale.getInfo(date);
    }
  }
};
</script>

<style lang="scss" scoped>
$uni-bg-color-mask: rgba(
  $color: #000000,
  $alpha: 0.4
);
$uni-border-color: #ededed;
$uni-text-color: #3d3d3d;
$uni-bg-color-hover: #f1f1f1;
$uni-font-size-base: 36rpx;
$uni-text-color-placeholder: #808080;
$uni-color-subtitle: #555555;
$uni-text-color-grey: #999;

.uni-calendar {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
}

.uni-calendar__mask {
  position: fixed;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  background-color: $uni-bg-color-mask;
  transition-property: opacity;
  transition-duration: 0.3s;
  opacity: 0;
  /* #ifndef APP-NVUE */
  z-index: 99;
  /* #endif */
}

.uni-calendar--mask-show {
  opacity: 1;
}

.uni-calendar--fixed {
  position: fixed;
  /* #ifdef APP-NVUE */
  bottom: 0;
  /* #endif */
  left: 0;
  right: 0;
  transition-property: transform;
  transition-duration: 0.3s;
  transform: translateY(460px);
  /* #ifndef APP-NVUE */
  bottom: calc(var(--window-bottom));
  z-index: 99;
  /* #endif */
}

.uni-calendar--ani-show {
  transform: translateY(0);
}

.uni-calendar__content {
  background-color: #fff;
}

.uni-calendar__header {
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  height: 50px;
  // border-bottom-color: $uni-border-color;
  // border-bottom-style: solid;
  // border-bottom-width: 1px;
}

.uni-calendar--fixed-top {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  justify-content: space-between;
  border-top-color: $uni-border-color;
  border-top-style: solid;
  border-top-width: 1px;
}

.uni-calendar--fixed-width {
  width: 50px;
}

.uni-calendar__backtoday {
  position: absolute;
  right: 0;
  top: 25rpx;
  padding: 0 5px;
  padding-left: 10px;
  height: 25px;
  line-height: 25px;
  font-size: 12px;
  border-top-left-radius: 25px;
  border-bottom-left-radius: 25px;
  color: $uni-text-color;
  background-color: $uni-bg-color-hover;
}

.uni-calendar__header-text {
  text-align: center;
  width: 100px;
  font-size: $uni-font-size-base;
  line-height: 50rpx;
  color: $uni-text-color;
}

.uni-calendar__header-btn-box {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
}

.uni-calendar__header-btn {
  width: 10px;
  height: 10px;
  border-left-color: $uni-text-color-placeholder;
  border-left-style: solid;
  border-left-width: 2px;
  border-top-color: $uni-color-subtitle;
  border-top-style: solid;
  border-top-width: 2px;
}

.uni-calendar--left {
  transform: rotate(-45deg);
}

.uni-calendar--right {
  transform: rotate(135deg);
}

.uni-calendar__weeks {
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
}

.uni-calendar__weeks-item {
  flex: 1;
}

.uni-calendar__weeks-day {
  flex: 1;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 72rpx;
  border-bottom-color: #f5f5f5;
  border-bottom-style: solid;
  border-bottom-width: 1px;
}

.uni-calendar__weeks-day-text {
  font-size: 26rpx;
  color: #979797;
}

.uni-calendar__box {
  position: relative;
}

.uni-calendar__box-bg {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.uni-calendar__box-bg-text {
  font-size: 200px;
  font-weight: bold;
  color: $uni-text-color-grey;
  opacity: 0.1;
  text-align: center;
  /* #ifndef APP-NVUE */
  line-height: 1;
  /* #endif */
}
</style>
